摘要
阐述了重介质浅槽分选机的工作原理。分析了潘三选煤厂主要存在合格介质循环泵设计选型偏大、上升流工艺不完善,浅槽管道布置不合理、上升流流量难以稳定控制,管路扬程大、循环介质泵工况点偏离最大效率工作区等问题。通过在原上升流管道加一路放料管、同时安装配套闸阀和数显压力表,调整上升流压力为0.033 MPa、保证槽内煤颗粒按密度分选,稳定悬浮液浓度、确定前部漏斗上升流压力为0.040 MPa,控制管道闸阀及压力表、确保压力准确,检查浅槽分选机运行状况、保持上升流压力的连续性等措施对选煤厂上升流工艺进行优化改造。改造后,选煤厂矸中带煤情况得到遏制,提高了精煤产率;实现了手动无极调节上升流流量,降低了分选密度和磁铁矿粉用量;每月增加销售收入300余万元,提高了选煤利润。
Introduce the technical principle of heavy medium in Pansan coal preparation plant. The circulating pump for shallow groove separator. There were lots of problems qualified medium was too large, the rising flow process was imperfect and difficult to stably control, the layout of shallow groove pipelines was unreasonable, the lift was high ,the circulating medium pump working point deviated from the maximum efficiency zone and the like. To resolve these problems, add a discharge pipe to the rising flow pipe, adjust the rising flow pressure to 0. 033 MPa by installing the valves and digital pressure gauge, ensure the groove coal density-dominant separation, stabilize suspension concentration,determine the front funnel upwelling pressure is 0. 040 MPa, control pipe gate valve and pressure gauge to ensure that the pressure is accurate, check the status, operation and shallow groove separation machine operation continuity, After transformation, avoid the clean coal mixing in gangue, increase the clean coal yield, the rising flow can be manually non-polar regulated, decrease the separation density and dosage of magnetite powder, the profits increase by 3 ×106 yuan every month.
出处
《洁净煤技术》
CAS
2013年第4期8-11,共4页
Clean Coal Technology
关键词
浅槽分选机
上升流
悬浮液
精煤产率
磁铁矿粉
shallow groove separator
rising flow
suspension
clean coal yield
magnetite powder
